var a = 0 && false || 1 && 2
console.log(a)
console.log(1>2>3,3>2>1)
console.log([1>2>3,3>2>1])
function foo(a, b) {
    arguments[1] = 2
    // alert(b)
    console.log(arguments[1],arguments[5])
    }
 foo(1)
 var myArr = ['foo', 'bar', 'baz']
myArr.length = 0
myArr.push('bin')
console.log(myArr)